六道计算题

更新时间2018-12-04 19:52:29

73.8-1.6+13.8-5.36

4.8乘以7.8+7.8乘以0.32

70.9乘以1.08-0.8乘以7.09

7.85+2.34-0.55+4.66

0.89乘以100.1

8.7乘以0.9+0.87

73.8-1.6+13.8-5.36

=72.2+13.8-5.36

=86-5.36

=80.64

4.8乘以7.8+7.8乘以0.32

=7.8*(4.8+0.32)

=7.8*5.12

=39.936

70.9乘以1.08-0.8乘以7.09

=7.09*10.8-0.8*7.09

=7.09*(10.8-0.8)

=7.09*10

=70.9

7.85+2.34-0.55+4.66

=(7.85-0.55)+(2.34+4.66)

=7.3+7

=14.3

0.89乘以100.1

=0.89*(100+0.1)

=0.89*100+0.89*0.1

=89+0.089

=89.089

8.7乘以0.9+0.87

=8.7*0.9+8.7*0.1

=8.7*(0.9+0.1)

=8.7*1

=8.7

 

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